1160-MA
Commercial Audio Series
180MA
Operation Manual
Obtaining Other Language Versions:
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice:
property of their respective owners.
Crown, Crown Audio and Amcron are registered trademarks of Crown International. Other trademarks are the
To obtain information in another language about the use of this product, please contact your
Some models may be exported under the name Amcron.
®
1160MA
280MA
©2005 by Crown Audio® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8200
137783-7
12/05
Important Safety Instructions
Commercial Audio Series Mixer-Amplifiers
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with a dry cloth.
7) Do not block any ventilation openings. Install
in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as
radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce
heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug
has two blades with one wider than the other.
A grounding-type plug has two blades and a
third grounding prong. The wide blade or the
third prong is provided for your safety. If the
provided plug does not fit into your outlet,
consult an electrician for replacement of the
obsolete outlet.
10) Protect the power cord from being walked on
or pinched, particularly at plugs, convenience
receptacles, and the point where they exit from
the apparatus.
11) Only use attachments/accessories specified
by the manufacturer.
12) Use only with a cart, stand, tripod, bracket, or
table specified by the manufacturer, or sold
with the apparatus. When a cart is used, use
caution when moving the cart/apparatus combination to avoid injury from tip-over.
13) Unplug this apparatus during lightning storms
or when unused for long periods of time.
14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus
has been damaged in any way, such as powersupply cord or plug is damaged, liquid has
been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally,
or has been dropped.
15) WARNING: TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPARATUS TO RAIN OR MOISTURE.
16) DO NOT EXPOSE TO DRIPPING OR SPLASHING. DO NOT PLACE OBJECTS FILLED WITH
LIQUID, SUCH AS VASES,ON THIS APPARATUS.
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE
TOP OR BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ
PAS LES COUVERCLES. IL N’Y A PAS DES PARTIES SERVICEABLE À L’INTÉRIEUR. TOUS REPARATIONS DOIT ETRE FAIRE PAR PERSONNEL
QUALIFIÉ SEULMENT.
TO COMPLETELY DISCONNECT THIS EQUIPMENT
FROM THE AC MAINS, DISCONNECT THE POWER
SUPPLY CORD PLUG FROM THE AC RECEPTACLE. THE MAINS PLUG OF THE POWER SUPPLY
CORD SHALL REMAIN READILY OPERABLE.
WATCH FOR THESE SYMBOLS:
The lightning bolt triangle is used to alert the user
to the risk of electric shock.
The exclamation point triangle is used to alert the
user to important operating or maintenance instructions.
IMPORTANT
Commercial Audio Series mixer-amplifiers require
Class 2 output wiring.
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equipment such as preamplifiers or tape decks directly
above or below the unit. Because this amplifier has
a high power density, it has a strong magnetic field
which can induce hum into unshielded devices that
are located nearby. The field is strongest just above
and below the unit.
If an equipment rack is used, we recommend locating the amplifier(s) in the bottom of the rack and the
preamplifier or other sensitive equipment at the top.
FCC COMPLIANCE NOTICE
This device complies with part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
CAUTION: Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
page 2
Operation Manual
Commercial Audio Series Mixer-Amplifiers
Crown International, Inc.
Issued By: Crown International, Inc.
1718 W. Mishawaka Road
Elkhart, Indiana 46517 U.S.A.
European Representative’s Name and Address:
Nick Owen
35, Bassets Field
Thornhill
Cardiff. South Glamorgen
CF14 9UG United Kingdom
Equipment Type: Commercial Audio Mixer-Amplifiers
Family Name: Mixer-Amplifiers
Model Names: 180MA, 280MA, 1160MA
EMC Standards:
EN 55103-1:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions
EN 55103-1:1997 Magnetic Field Emissions-Annex A @ 10 cm and 1 M
EN 61000-3-2:2001 Limits for Harmonic Current Emissions (equipment input current 16A per phase)
EN 61000-3-3:2002 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current 16A
EN 55022:2003 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class B
EN 55103-2:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity
EN 61000-4-2:2001 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)
EN 61000-4-3:2001 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, Criteria A)
EN 61000-4-4:2001 Electrical Fast Transient/Burst Immunity (Criteria B)
EN 61000-4-5:2001 Surge Immunity (Criteria B)
EN 61000-4-6:2003 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)
EN 61000-4-11:2001 Voltage Dips, Short Interruptions and Voltage Variation
Safety Standard:
IEC 60065: 2002 7th Ed. Safety Requirements - Audio Video and Similar Electronic Apparatus
CAN/CSA-E60065-03 7th Ed. Audio, Video and Similar Electronic Apparatus-Safety Requirements
UL 60065 7th Ed. Audio /Video and Musical Instrument Apparatus for Household, Commercial and Similar General Use.
I certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC,
and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.
Signed
Larry Coburn
Title: Senior Vice President of Manufacturing
DECLARATION of CONFORMITY
FOR COMPLIANCE QUESTIONS ONLY:
Sue Whitfield
574-294-8289
swhitfield@crownintl.com
Date of Issue: Jan. 1, 2006
Operation Manual
Due to line current harmonics, we recommend that you contact your supply authority before connection.
page 3
Table of Contents
Commercial Audio Series Mixer-Amplifiers
Important Safety Instructions .......................................................2
Declaration of Conformity ............................................................3
1 Welcome ................................................................................5
1.1 Features ...........................................................................5
1.2 Front Panel Controls and Indicators................................6
1.3 Back Panel Controls and Connectors................................7
2 Setup ......................................................................................8
2.1 Installation........................................................................8
2.2 How to Attach Rack Ears ...................................................8
2.3 Choose Input Wire and Connectors .................................9
2.4 Choose Output Wire and Connectors ...............................9
2.5 Wire Your System ............................................................10
2.6 Input Routing....................................................................11
2.7 Phantom Power................................................................11
2.8 Priority Muting.................................................................11
2.9 Link In/Out Switches.........................................................11
2.10 Remote Volume Control..................................................12
2.11 Four-Tone Generator.......................................................12
2.12 Powering Up...................................................................12
2.13 Included Accessories......................................................12
2.14 Optional Accessories......................................................12
2.15 Block Diagram................................................................13
3 Troubleshooting ..................................................................14
4 Specifications ..................................................................... 15
5 Service ... .............................................................................. 16
5.1 Worldwide Service .......................................................... 16
5.2 US and Canada Service .................................................. 16
5.2.1 Service at a US or Canada Service Center ............. 16
5.2.2 Factory Service ......................................................16
5.2.3 Factory Service Shipping Instructions ................... 16
5.2.4 Packing Instructions ..............................................16
5.2.5 Estimate Approval................................................... 16
5.2.6 Payment of Non-Warranty Repairs..........................16
6 Warranty .............................................................................. 17
Warranty Registration.................................................................. 19
Crown Factory Service Information Form .....................................21
page 4
Operation Manual
Commercial Audio Series Mixer-Amplifiers
*
1 kHz
180MA
Minimum guaranteed power
into 4 ohms or 70V/100V output
*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.
Power
80W
280MA
Minimum guaranteed power
per channel into 4 ohms or
70V/100V output
*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.
1160MA
Minimum guaranteed power
into 4 ohms or 70V/100V output
*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.
*
1 kHz
Power
80W
*
1 kHz
Power
160W
1 Welcome
The Crown® 180MA, 280MA and 1160MA are
high-value mixer-amplifiers for commercial
and industrial audio. They provide 4-ohm and
constant-voltage outputs (70V and 100V). The
mixer-amps are part of Crown’s Commercial
Audio Series, which also includes mixers and
power amplifiers. These low-cost units provide
all necessary features in a simple buildingblock format.
1.1 Features
• 4 to 8 inputs, 1 to 2 amplifier output channels
• Ideal for commercial and industrial use
• Expandable by adding Crown Commercial
Audio mixers or Commercial Audio power
amplifiers (when available)
• Balanced Phoenix-type mic/line inputs;
touch-proofed screw-terminal speaker outputs
• Independent Bass and Treble controls on
each input
• Any input can be sent to any output
• Built-in four-tone generator
• Priority muting
• Advanced protection system includes output
current limiting, DC protection, circuit breaker/
fuse, and thermal protection. Details available
online at www.crownaudio.com.
• Three-Year, No-Fault, Fully Transferable
Warranty completely protects your investment
and guarantees its specifications
Operation Manual
page 5
1 Welcome
Commercial Audio Series Mixer-Amplifiers
1.2 Front Panel Controls and Indicators
A. Input Signal Presence Indicator
Green LED, one for each input channel, illuminates when
input signal exceeds –24 dBu (line) or –70 dBu (mic).
B. Input Volume Controls
Microphone/line, four in 180MA and 1160MA, eight in
280MA. Detented potentiometers with knobs.
C. Output Volume Controls
One per output channel. Detented potentiometer with
knob.
D. Output Signal Presence Indicator
Green LED, one for each output channel, illuminates
when output signal level exceeds 100 mV (45 dB below
full power) from the 4-ohm tap. Does not respond to signals from the AMP INPUT connector.
E. Clip Indicator
Red LED, one per output channel, illuminates at threshold of audible distortion. Does not respond to signals
from the AMP INPUT connector.
F. Power Indicator
Blue LED indicates power on.
G, H. Tone Controls
Bass and Treble non-detented potentiometers on each
input channel. Bass ±10 dB at 100 Hz, Treble ±10 dB at
10 kHz.
I. Power Switch
Pushbutton on-off switch. The power switch does not
affect the 24V DC auxiliary power input (letter “K” on
next page).
page 6
Figure 1.1 Front Panel Controls and Indicators
Operation Manual
Commercial Audio Series Mixer-Amplifiers
1 Welcome
1.3 Back Panel Controls and Connectors
J. Reset Switch
Resets the circuit breaker that protects the power supply.
220/230/240V units have a fuse instead.
K. Auxiliary Power Input
2-position terminal strip for 24 VDC (±10%) backup power.
Accepts up to 10 AWG terminal forks. NOTE: To
prevent a spark when attaching a battery, have
unit turned on and connected to the mains supply.
L. Amplifier Outputs Connectors
One per channel, 4-position terminal strip with COM (Common), 4 ohms, 70V and 100V terminals. Accepts up to 14
AWG terminal forks. Non-touch cover included.
M. Amp Config Switch
A DIP switch with two functions:
1. Assigns one of the inputs as the priority input for each
output, thereby temporarily muting the remaining inputs.
Muting is activated by contact closure.
2. Global enable switch for phantom power. Does not affect
RCA inputs. Default position is off.
N. Input Routing Switch (280MA only)
DIP switches that assign each input signal to each output.
Two switches per input.
O. Link In/Out Switch
Slide switch, one per channel. With the Link Switch IN, any
signal applied to the Amp Input connector will be mixed
with the input signal(s). With the Link Switch OUT, only the
signal from the Amp Input Connector will appear at the
amplifier output.
P. Mic/Line Input Connector
3-pin Phoenix-type, balanced, one per input channel.
Q. Mic/line Switch
Selects mic-level or line-level input signals. One switch for
each balanced input.
R. Dual RCA Input Connector
For stereo music signals, unbalanced, summed together,
two connectors per input channel. If required, both the mic/
line and RCA inputs may be used at the same time. The mic/
line gain switch does not affect the RCA gain, which is fixed
relative to mic/line. The mic/line and RCA signals are
mixed. Note: Other equipment connected to the RCA jacks
should be connected to the same AC power source as the
mixer-amp to avoid hum.
S. AC Power Inlet
Detachable IEC.
T. Priority Connector
3-pin Phoenix-type connector allows Input 1 or Input 5
(280MA only) to mute other input signals by contact closure.
U. Output VCA Connector
4-pin Phoenix-type connector for one (180MA) or two
(280MA) VCA control lines of +10 VDC and ground. Compatible with Crown 1-VCAP and 4-VCAP modules.
V. Amp Input Connector
3-pin Phoenix-type, high-impedance balanced, one per
amplifier channel. Used to link an additional mixer to the
mixer-amplifier. Or used to connect an external processor
(see Section 2.9).
W. Line Out Connector
One 3-pin balanced Phoenix-type connector per output
channel. Post master, pre-VCA. Level controlled by master
volume control.
X. Tone Generator Connector
5-pin Phoenix-type connector. Tones include Pre-Announce
Chime, Bell, Alert Tone, and Evacuate Tone. All tones are
activated by contact closures on the connector.
Y. Tone Level
One potentiometer per output channel sets the volume of
the tones. Tone level is not affected by output volume controls or VCAs.
The Pre-Announce Chime is a special case. It is mixed with
Channel-1 signals, so its level will be affected by the master
volume control and VCAs.
S
Operation Manual
NO FUNCTION
Figure 1.2 Back Panel Controls and Connectors
(280MA shown)
page 7
2 Setup
Commercial Audio Series Mixer-Amplifiers
2.1 Installation
CAUTION: Before you begin, make sure your
mixer-amplifier is disconnected from the
power source, with the power switch in the
“off” position and all level controls turned
completely down (counterclockwise).
Use a standard 19-inch (48.3 cm) equipment rack
(EIA RS-310B). See Figure 2.1 for amplifier dimensions.
You may also stack mixer-amps without using a
cabinet, or you may place a single mixer-amp on a
surface with 12 inches of air space around the unit
for convection cooling.
NOTE: When transporting in a rack, mixer-amps
should be supported at the front and back.
When using an equipment rack, do not mount units
directly on top of each other. Allow 2 U between
units for convection cooling. The side walls of the
rack should be a minimum of two inches (5.1 cm)
away from the amplifier sides, and the back of the
rack should be a minimum of four inches (10.2 cm)
from the amplifier back panel.
3.5 In.
8.9 cm
2.2 How to Attach Rack Ears
1. Locate the two rack ears and two rack-ear screws
supplied.
2. See Figure 2.2. Remove the two screws from each
side of the chassis near the front.
3. Place a rack ear flush with the right front of the
chassis.
4. Insert a screw that you removed into the bottom
hole of the rack ear and chassis. Screw it in.
5. Insert a screw that you removed into the center
hole of the rack ear and chassis. Screw it in.
6. Insert one of the supplied screws into the top hole
of the rack ear and chassis. Screw it in.
7. Repeat steps 3-6 for the left side of the chassis.
4.1 In.
10.5 cm
Figure 2.2 How to Connect Rack Ears
page 8
17.3 In.
43.8 cm
12.2 In.
31.0 cm
13.9 In.
35.2 cm
Figure 2.1 Dimensions
Operation Manual
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